Geographical clock.



No. 682,0l6. Patontod Sept. 3, |90I.

c. ALBAN. GEOGRAPHICAL CLOCK.

(Application mod Feb. 98, 1901.) (lo lndnl.)

WTNESSES UNITED STATES PATENT OFFICE.

CARLOS ALBAN, OF PANAMA, COLOMBIA.

GEOGRAPHICAL CLOCK.

SPECIFICATION forming part of Letters Patent No. 682,016, dated September 3, 1901. Application filed February 28, 190].. Serial No. 49,272. `(No model-l To all whom, it 17m/y concern.'

Be it known that I, CARLOS ALBAN, a citizen of the Republic of Colombia, and a resident of Panama, Republic of Colombia, have invented new and useful Improvements in Clocks, of which the following is a full, clear, and exact description.

My invention relates to that class of clocks in which provision is made for indicating simultaneously the local time of different cities, and has for its object to provide a simple construction of'clocks of said class the hour-hand of which may be readily adjusted to the local time oi' dierent cities and which has a peculiar novel arrangement of the openings intended for the insertion of the winding-key.

To this end my invention consists of certain features of construction and combinations of parts, as will be fully described hereinafter and particularly pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure l is a front elevation of a clock provided with my improvements, and Fig. 2 is a side View thereof with parts in section.

The improved clock comprises a suitable casin g A,in which is located the clockwork B, of any approved construction, for driving the spindle C, on which is fastened the minutehand D, and the sleeve E, which inV ordinary clocks carries the hour-hand. According to my invention, however, the sleeve F. carries a disk F of smaller diameter than the customary dial G, so as to leave the marginal or indicating portion of the dial exposed to view. Said disk is provided with a series of radial lines F', representing meridians, and the names of various important cities are produced adjacent to such lines, it being understood that the lines are properly spaced from each other corresponding to the time difference of the several localities. The clock might be used without an hour-hand; but I prefer to provide an hour-hand I'I, which is fitted to the disk F tightly enough to rotate with it under normal conditions, but still with suilcient looseness to allow the hour-hand to be turned, if desired, to coincide with any one of the lines or meridians of the disk F. It

will be understood that the hour-hand can thus be set to indicate prominently the local time of any city, while the meridians F will indicate less prominently the local time of other cities. The disk F may, if desired, carry a complete map instead of mere meridian lines. The dial G has the usual holes G' Gr2 for the insertion of a key to wind the clockwork proper and the striking mechanism, respectively, and according to my invention the disk F is arranged to cover said holes at all times, except once in every revolution of the disk, when holes F2 F3 of the disk will register with the holes G' G2 of the dial, allowing the clock to be wound. The clock therefore must always be wound at the same hour, as it should be to insure regular motion of the works. Furthermore,owin g to this pecnliarity the clock may be used as a cheek on watchmen and other employees whose duty it would be to wind the clock at a certain hour, and their neglect to do so would be detected by the run ning down of the clock. Of course the same feature is applicable to clocks having no striking mechanism. In this case the dial G and disk F would each have one opening only.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a clock, a dial having a winding-hole, an hour-hand spindle, and a disk held to rotate with the hour-hand spindle and engaged to normally cover the said hole, said disk having a hole adapted to register with that of t-he dial. 2. In a clock, a dial having a winding-hole in its central portion, and time indications at its marginal portion, an hour-hand spindle, a disk held to rotate with the hour-hand spindle and covering the central portion of the dial while leavin g the marginal portion thereof exposed, said disk having an opening adapted to register with the winding-hole of the dial, and a series of radial or meridian lines, and an hour-hand held to normally rotate with said disk but adjustable to any one of the meridian lines.

In testimony whereof I have signed my name to this specification, in the presence of twosnbscribing witnesses, at Panama, .December 17, 1900.

CARLOS ALBAN.

Witnesses:

MARIE EsrUIssAK, J. GABRIEL DUGUL.

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